I’ve been lurking for answers, I have found some but not definite. I am so close to completing my del sol gsr swap but I have ran into an issue. 1st I’m trying to get it bard so I would like to use oem parts. 2nd, I swapped in a obd1 95 gsr motor but the headers don’t fit as it is too short to bolt to cat. I’ve read on here that a 99-00 gsr header will work however I want to know if that should work and would pass bard inspection. Also from what I read it said the 99-00 gsr headers should fit as they are longer and will bolt to my oem del sol cat/piping.

 

Why don't you just cut and extend the piping behind the cat and move it forward to reach the header you have? You could bolt on an extention or weld one in, would be cheap and easy compare to buying another exhaust manifold and hoping if fits to where you want. Having the catalytic converter closer to the head will help with its efficiency as it gets hotter too.

 

Wrong answer for California emissions.

Find the correct length header and cat combination if using oem parts.

 

any suggestions for it to work no or california emissions?

 

You are on the right track with respect to the '99-00 GSR exhaust manifold... it should bolt up to your factory cat (assuming it is an Si or VTEC Del Sol). You can also use a '94-95 GSR cat and bolt it up to the exhaust manifold that you currently have and the cat-back exhaust on the car.

 

If the intent is to have it BAR’d then the catalyst must be correct for the engine. So you’ll need one with the correct EO for the same year GS-R as your engine is from. Get a weld-up one and you can make it whatever it length you need it to be when you get it flanged up.

 

So 95 gsr headers + 95 cat + del sol catback exhaust should work?

 

What year is the 'Sol?

 

Its a 94 del sol si with a 95 gsr swap.

 

You'll want 95 everything then.

Don't use a 96+ cat, if they inspect it for correctness you will fail. If it's aftermarket, they will look for the CARB EO# on it. If there's no number on it, it's a 49-state cat and fails. If it's an OBD2 cat, it likely has the wrong number on it and it fails.

If it's an oem converter, they will make phone calls and google for pictures and do whatever they need to do to verify that it's the correct converter for the engine. You might get away with it, but if you don't you get to circle back, buy parts again, and go through the scheduling and ref visit process again. It's just not worth the headache of trying to shortcut in any way. I also think the likelihood of finding a 27-year old oem converter that still works well enough to pass a tailpipe test is exceedingly low.

Easiest and ultimately cheapest option from all directions ends up being to get a weld-up CARB compliant converter for a 95 Integra and have it flanged to whatever header and cat-back you intend to run. Anything else requires mixing and matching parts and/or banking on the inattentiveness of your referee. Been there done that.

 

thank you very much. Most useful info I’ve received so far for bard questions I had.

 

One last question, for getting it bard will a d16z6, my stock cat work to pass smog with the gsr motor ?

 

Probably not.

Depends on two things:

- The Referee inspecting. It shouldn’t pass because it’s not the one for a 95 Integra. They are different, period. An attentive referee won’t pass it. There’s a chance they might not notice though, or they do notice and let it slide and tell you.

- It still works well enough to pass a tailpipe test. It’s likely at least 27 years old. It probably won’t pass tailpipe. But also it might.

It’s up to you to decide if you want to show up prepared or to leave some things to chance. You might get away with something, or you might waste everyone’s time and have to go back and redo something that you should have done in the first place. Choose your own adventure.